纤维桩修复不同箍结构前磨牙的牙根抗力研究  

EVALUATION OF THE EFFECTS OF DIFFERENT FERRULE DESIGNS ON THE MANDIBULAR PREMOLARS INCORPORATING FIBER POSTS,COMPOSITE CORES AND CROWN RESTORATIONS

作　　者：李红[1] 张倩[1] 

机构地区：[1]青岛大学医学院,山东青岛266021

出　　处：《山东医学高等专科学校学报》2011年第1期16-18,共3页Journal of Shandong Medical College

摘　　要：目的研究不同形态的箍结构对纤维桩核修复下颌前磨牙后牙体抗力的影响。方法将48颗下颌第一前磨牙分为6组。第1组:根管治疗后全冠修复;第2组:具有1 mm的360°包绕的箍结构;第3组:仅颊侧有1 mm的箍结构;第4组:仅舌侧有1 mm的箍结构;第5组:颊、舌侧有1mm的箍结构;第6组:无箍结构。所有离体牙均用纤维桩、树脂核及烤瓷熔附金属全冠修复,并以1 mm/min的速率加载压缩力,直到出现断裂。结果第1组牙根折裂的加载力值为(1067.6±234.30)N,大于第六组的(668.9±230.90)N(P<0.05),其余组间比较无统计学意义(P>0.05)。结论纤维桩核冠可用于各种情况的前磨牙残根的修复。Objective To evaluate the fracture resistance of endodontically treated mandibular premolars restored with quartz fiber posts, composite cores, and crowns when different types of ferrule designs were incorporated. Methods Fortyeight mandibular premolars were divided into six groups： Group 1 ： teeth with root canal treatments having a full crown prosthesis; Group 2： teeth with a 1mm circumferential ferrule; Group 3： teeth with a lrnrn ferrule only in the buccal region; Group 4： teeth with a lmrn ferrule only in the lingual region; Group 5： teeth with a 1mm ferrule in the buccal and lingual region, ;and Group 6： teeth with no ferrule. All the extracted teeth were restored with quartz fiber posts- composite cores and porcelain fused to metal crowns. All experimental teeth were subjected to an increasing compressive force with a crosshead speed of 1mm/min until thec fracture occurred. Results The loading force value （ 1067.6 ± 234.30N） in the first group was hjigher than the sixth group （668.9 ±230.90N）, and there was significant difference between them（ P 〈0.05）. The remaining groups showed no statistical significance. Conclusion Fiber post and core can be used for a variety of：mandibular premolars with a wide range of prospects.

关 键 词：箍结构 纤维桩 桩核冠 抗折力 

分 类 号：R783[医药卫生—口腔医学]